import os
import subprocess
import sys

from intex.intex_scenarios import generate_scenarios
from json import loads, dumps

def build_portfolios(workdate, dealname, reinvflag):
    rpath = os.path.join(os.environ['CODE_DIR'], "R")
    logpath = os.path.join(os.environ['LOG_DIR'])
    args = ["Rscript", "--vanilla", os.path.join(rpath, "build_portfolios.R"), \
            workdate, dealname + "," + reinvflag]
    with open(os.path.join(logpath, "build_portfolios.Rout"), "w") as fh:
        subprocess.call(args, stderr=subprocess.STDOUT, stdout=fh, env=os.environ,
                        cwd=rpath)

def build_scenarios(workdate, dealname, reinvflag):
    rpath = os.path.join(os.environ['CODE_DIR'], "R")
    logpath = os.path.join(os.environ['LOG_DIR'])
    args = ["Rscript", "--vanilla", os.path.join(rpath, "build_scenarios.R"), \
            workdate, dealname + "," + reinvflag]
    with open(os.path.join(logpath, "build_scenarios.Rout"), "w") as fh:
        subprocess.call(args, stderr=subprocess.STDOUT, stdout=fh, env=os.environ,
                        cwd=rpath)

class Rpc(object):
    def __init__(self, fun, args):
        self.fun = fun
        self.args = args

    def __str__(self):
        return dumps({'fun': self.fun,
                      'args': self.args})
    def __call__(self):
        globals()[self.fun](*self.args)

    @classmethod
    def from_json(cls, s):
        rpc = loads(s)
        if sys.version_info[0] < 3:
            instance = cls(rpc['fun'].encode(), [arg.encode() for arg in rpc['args']])
        else:
            instance = cls(rpc['fun'], rpc['args'])
        return instance